شرح اضافة موضوع

( 3g2, 3gp, bmp, doc, docm, docx, gif, jpg, m4a, m4v,
 mov, mp3, mp4, mpg, pdf, png, pps, ppt, pptm, pptx, swf, tif, txt, wma,
 wmv, xls, xlsb, xlsm, xlsx, zip )